Portable milling-machine.



' 0. RODGERS. I PORTABLE MILLING MACHINE. APPLlCATION FILED JAN. 15. l9H-.

1,249,672. Patented Dec. 11,1917.

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POHTABLEYNIILLING MACHINE. APPLICATION FILED JAN- 15. 1911. 1,249,672.

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"llitdii lifl RODGElEtS, U15 SEATTLE, WAElI-IINGTON, A "BUEPORATIUN, (ill? SEATTLE, tlI'iQtE-iIl'lINGl-TON, .tt (3 PORTABLE ZlEILLII IG'rJIiAt'JI-HNJEL sum Specificatton of Letters Patent.

application filed. January 15, 191W. %eria1lt'o.;tea,i6tt

the construction of the hulls of marine vessels, the operation of the milling cutter being controlled so as to insure accuracy and uniformity in its operations without requiring special skill or adjustment on the part of the operator.

The invention consists essentially in a frame. provided with work-clamping devices, a carriage mounted on the frame and carry ing a milling cutter and its operating mechanism.

'llhe invention further consists in the novel construction, adaptation andcolnbination of parts, as will be hereinafter described and claimed.

in the accompanying drawings, Figure l is a plan view of a machine embodying the present invention. Fig. 2 is a side elevational view thereof. Fig.7? is a front eleva tional view of the same. lFig. l.- is a longi tudinal vertical section of the machine shown applied to the work. Fig. 5 is a per spective fragmentary view of a plate having a recess such as may be cut therein through the instrumentality of the present invention.

'l he machine is provided with a. frame having a bifurcated front portion to afford a gap 11 (Fig. 1) between two wing members 12. [it each side of said gap the frame is formed with grooves having relatively inclined surfaces 13 and 18 to afford a longitudinal guideway of dove-tail shape to re ceive a correspondingly shaped base 14 of a carriage 15 which carries the operating mechanism.

flash of said wing members are formed or provided with one or more pairs of longn tudinally disposed jaws 16, the complementary ones being arranged to furnish therebetween slots l? which eatend rearwardly from the front of the frame in inclined relation to the aforesaid 'uideway.

18 and 18 represent set screws extending through the frame jam s16 into the respective slots and serve to rigidly clamp the frame to the worlr, such as a plate P, when the latter is introduced into the slots, as illustrated inl ig.

Elaid war rings is provided with journal boxes 19 and for-upright shafts 21Tand 252 one in advance of the other and in front of an electric motor 23 which is rigidly secured to the rear end. of the carriage. The shaft 21 has mounted thereon a spur gear 24L meshing with a corresponding pinion 25 mounted on the shaft 522 on which is also mounted a bevel gear 20 which is driven by a pinion 2? provided on the armature shaitof said motor. 1 y

The shaft 21 extends below its journal box 19 into the frame gap 11 to receive a milling cutter 28 which is desirably connected to the shaft by having a tapering portion 21 of the latter fit into a correspondinglyshaped socket ofthe cutter and by the provision of a coupling bolt 29 extending anially throughthe shaft and with its thread ed lower extremity engaging in a flanged nut 30 which bears against the underside of the cutter. y

31 represents a longitudinally disposed screw-threaded spindle engaging in a nut 32 attached to the frame and extends through an apertured lug 33 of the carriage, and to which it is connected against relative longitudinal movements by the provision of a collar. 3% on the spindle at one side of the lug and a wheel 35 which is secured to the spindle at the other side of the lug. @aid wheel is advantageously provided with a cranlchandle 35 whereby the spindle is con veniently rotated by the operator to effect the feeding or retracting movements of the carnage. y I y 36 (Fig. 3) represents a wearing strip interposed between one of the way surfaces 13 and theopposingsurface of the frame base,and is adjusted to compensate for wear by means of set screws such as 37.. its illustrated, the frame is provided on each side with an apertured ear 38 whereby the ma chine is tiltably suspended, as by means of rods 89 from any suitable support.

in operation. the plate l? which is to be machined or cut to provide therein recesses Patented Dec. 11, 1917.."

such as B, (Fig. 5), may be placed on trestlesor other suitable supports. The ma: chine then brought; forward to have the edge of the plate enter the slots 17 between the various pairs of frame jaws 16, and against the throats 17 and, if required, shifted laterally to properly position the cutter with respect to the plate.

The machine frame is then clamped to the work by means. of the set screws 18.

The oflice of the set screws 18 is to furnish. adjustable rests or supports for the plate in the various slots 17 whereby the inclination of the plate relative to the direction of travel of the carriage and the milling cutter carried thereby, may be regulated to cause the bottom R of a produced recess. R to be at a selected inclination with respect to the upper and lower surfaces of the plate.

ll hen, the machine frame is thus secured to the work, and the motor actuated to drive the milling cutter, the latter is advanced by imparting a forward movement to the carriage through the agency of the feed screw 31' acting in the nut 32.

The milling cutter being fed forward effects the cutting of a recess in the plate, as will be understood...

Among the uses to which the present invention may be employed, is for cutting away material in overlapping portions of the plates of a ship hull to accommodate the frame, ribs and thereby enable the latter to be juxtaposed with the. plates.

That I' claim, iS..-

1.. In a machine. of. the class. described, t combination. with a carriage carrving a milling cutter and operating mechanism therefor of a frame having guideways to engage said carriage for relative longitudinal'travel, said f1? me being rovided at opposite sides of said guideway with slots to receive the work, set screws extending; into th respecti e, slots f r clamping the machine frame to the work.

2,. In a machine of. the class described, a-

frame having two spaced wing members,

pairs of complementary jaws rigid with the respective wing members, set screws ex ending from below and from above into the slots obtaining between each pair of jaws, the lower of said set screws serving as bearing supports for a plate to. be operated on and the upper set screws co operating with the lower screws for Clamping the, plate to the frame. at a. selected annaeaeva gular relation, a substantially upright shaft, a milling cutter mounted thereon, and means to drive the shaft for actuating said cutter.

8. In a machine of the class described, a frame having two forwardly directed wing members to afford a gap l'herebctwcen, plaicclamping devices provided on the respcc-- tive frame members, a carriage mounted on the frame for longitudinal movements, means for effecting the movements of the carriage, an upright shaft mounted in the carriage, a milling cutter secured to said shaft within the referred-to frame gap. and means carried by the carriage for driving said shaft to actuate the milling cutter.

at. A machine of the class described, including a pair of spaced wings having a gap thercbetween, inclined jaws in each said wing having a means for securing a plate in adjustable inclined positions therein, a carriage movable longitudinally in a guideway provided in the fran'ie, a nut secured in said frame, a screw spindle engaging in said nut and connected to the carriage, means for rotating said swindle to effect the lougitudinal movements of the carriage, a. vertical shaft carried by said frame, a milling cut-- ter mounted on said shaft and means to drive the shaft for actuating said cutter.

5. A. machine of the class described, comprising a frame provided with a longitudinal gap, means provided in the frame for securing the same at opposite sides of the gap to a plate which is to be operated upon, an upright shaft, milling cutter mounted on said shaft and operable within the frame gap, power-operated means for rotating said cutter, and mannally-actuatcd means for effecting feed movements to the shaft and. cutter with respect to the plate.

6. A machine of the class described, comprising a frame having clamping jaws on each side of its longitudinal. axis, means for Securing a plate in said jaws at selected inclinations relatively of the frame, a carriage slidably mounted on said frame, a. milling cutter and means for driving the same carried on said carriage, and means opcrativcly connecting the frame with the carriage whereby the latter is influenced to effect the feeding movements of said cutter.

Signed at Seattle, Washington, this 30th day of December, 1916.

DAVID RODGERS. lVitnesscs E. PETERSON, HORACE BARNES.

(Sonics-e15 this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

